In a small sauce pan melt chocolate and sweetened condensed milk together till almost boiling and completely melted. Pour into a bowl and add marshmallows half at a time. Pour over a pan that is lined with graham crackers. Pat down with hands that are slightly greased. Top with another layer of graham crackers or graham cracker crumbles. Push the top layer down firmly so it sticks. Let chill for at least 2hrs till firm. ENJOY!!